| Value | Category | Cases | |
|---|---|---|---|
| 1 | Grade 1 | 465 |
13.9%
|
| 2 | Grade 2 | 363 |
10.9%
|
| 3 | Grade 3 | 422 |
12.6%
|
| 4 | Grade 4 | 573 |
17.1%
|
| 5 | Multigrade | 1519 |
45.5%
|
| Sysmiss | 988 |